1st don't show him that you have developed a doute on him!!!!
2nd don't belive what he is saying no matter how ever pleasing his speech may be just keep observing what he is doing rather than saying.
3rd get in touch with his friends girl friends/wifes!! and i am sure they may have some info(may be right or wrong you just analyse them)
4th try to make him very angry once in a while so that he should speak out with anger and just wait for some hints that he may give or that will be an opportuniy to you understand his real feelings.
5th try to have secrate trap on all his communicaions(cells/mails etc)
6th keep giving surprice visits to his work places or anywhere he told that he will be.
last but not the least at any situatiuon he should not come to know about all these 6 things.
if you like this answer, for more disscution you cancatch me on toughard@in.com
Chuck him and find a new boyfriend.
ask him upfront
you catch him out.
If you can forgive your sister, you can forgive your boyfriend. It doesn't necessarily mean that you should stay with your boyfriend. Cheating is cheating and if that is not acceptable to you, you should find someone who will respect that wish.
by asking your best friend to spy on him
No it is not cheating on your bf. As long as nothing physical happens your not cheating.Talk with your boyfriend about how much you're allowed to do with other guys without cheating him. Everyone has different ideas of what cheating is and what matters is that you two find a common ground and agree not to break that.
Find a new boyfriend. If he did it once and you forgive him. He'll do it again and expect the same.
there probably cheating on you
If you have a girlfriend and a boyfriend, then you are cheating on both of them.
Then do nothing and be glad he is no longer your boyfriend.
Answer If you know for sure that your new bf is cheating then perhaps it's time to drop him and find another boyfriend, who needs the hassel of a guy who lies from the seat of his pants.
You could follow him without his knowing about it. Good Luck!